Size 5 Never Worn Non Smoking Home Received as gift and didn’t fit Rhinestone encrusted leather. Lightweight, flexible EVA midsole absorbs shock, reducing stress on feet, ankles, and knees. Vionic Technology is biomechanically designed to hug your arches and support your feet in comfort. Vionic sandals' built-in orthotic is shown to be effective in helping to treat heel pain (plantar fasciitis).*